#define  _CRT_SECURE_NO_WARNINGS 1
int removeDuplicates(int* nums, int numsSize)
{
    if (numsSize == 0)
        return 0;
    int fast = 1;
    int slow = 1;
    while (fast < numsSize)
    {
        if (nums[fast] != nums[fast - 1])
        {
            nums[slow] = nums[fast];
            slow++;
        }
        fast++;
    }
    return slow;
}